Gearing.



E. A. JOHNSTON.

GBARING.

APPLICATION rum) r1113. 26, 1909.

Patented Apr. 18, 1911.

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positive in its action and so mounted that Patent No. 819,331, May 1,1906, A. T.

EDWARD ARTHUR JOHNSTON, OF AKRON, OHIO, ASSIGNOR T0 INTERNATIONALHARVESTER COMPANY, A CORPORATION OF NEW JERSEY.

ennnrne.

To all whom it may concern:

Be it known that I, EDWARD A. JOHNSTON, a citizen of the United States,residing at Akron, in the county of Summit and State of Ohio, haveinvented certain new and useful Improvements in Gearing, of which thefollowing is a specification.

My invention relates to transmission gear ing, and in particular tospeed changing gearing when used in connection with automobileconstruction, and consists in means whereby the lever controllingmechanism for changing the speed of the driving elements is locked inits adjusted position when the motor is equipped with the transmissiongearing, and cannot be manipulated by the operator so long as saiddriving elements are operatively connected, the object of my inventionbeing to provide a locking mech anism of the kind indicated that will beits operation will not be affected by the wear of the associated partsof the mechanism. This object is attained by means of the mechanismillustrated by the accompanying drawing, in which Figure 1 is a planview of a. transmission gearing embodying my invention; Fig. 2 is a sideelevation of Fig. 1; Fig. 3 is a detached detail of part of the lockingmechanism; Fig. 1 is an end view, partly in section, of Fig. 2, designedto illustrate the manner of mounting the gear locking detent; Fig. 5 isa detail showing the engagement of the locking detent with a notchedsector; Fig. 6 is a. detail of the brake mechanism in connection withthe locking means; Fig. 7 is an elevation of Fig. 6. Fig. 8 is a rearend elevation of Fig. 1; Fig. 9 is a longitudinal section of Fig. 8along line AA; Fig. 10 is an enlarged sectional view, partly inelevation, illustrating one of the gears and contiguous parts; and Fig.11 1s an enlarged sectional View, partly in elevation, on line BB ofFig. 8.

The gear locking mechanism of my invention is applicable to differentforms of transmission gearing, but is designed in particular to be usedin connection with a sliding gear mechanism such as is shown in Brown.

The same reference characters deslgnate like parts throughout theseveral views.

Specification of Letters Patent.

Application filed. February 26, 1909.

1 represents a gear case having a remov- Patented Apr. 18, 1911. SerialNo. 480,141.

able top 2, secured by screws 3 to the side and end walls of the case.The opposing end walls of the case are each provided with integralinternally threaded hubs 4, 5 below the top 2, the hubs 41 being closedby caps 6, and the hubs 5 being provided with axially perforated caps 7.Said caps 6 extend into the hubs 1 and are provided with externalthreads meshing with the internal threads of the hubs, and are alsoprovided with annular shoulders 8 engaging the ends of the hubs, andwith sockets 9 extending axially from the inner ends of the caps andhaving closed outer ends. The end walls of the case are also providedwith channels 10 opening through the inner faces of said walls andthrough their upper edges opposed to the cover 2. One of the end wallsof the case is formed with an internally threaded hub 11 (Fig. 10), andthe bottom of the case is provided with an internal lug 12 formed with abearing alined with the opening of the hub 11. The case is also providedwith an upright journal bearing 13 extending from the bottom andterminating near the top 2, the opening of the bearing extending throughthe outer face of the bottom.

The power transmitting means includes a driving shaft 14; passed throughthe opening of one of the caps 7 and journaled in a bearing 15 withinone of the hubs 5, a driven shaft 16 passed through the opening of theother cap 7 and journaled in a bearing 17 in the other cap 5, acountershaft 18, journaled in bearings 19, mounted in the sockets 9 ofthe caps 6, and a spindle 20 supported in the hub 11 and the lug 12. Asillustrated in Fig. 9, the driving shaft 1 1 terminates near the bearing17 for the driven shaft 16, and carries a gear 21, fixed thereto andprovided with a socket 22 extending axially from its inner side, andwith a hollow hub 23 which projects from its opposite side, encirclesthe portion of the shaft 141 within the bearing 15, and is journaled inthe bearing 15. As will be obvious to those skilled in the art, the hubof the gear 21 is essentially a part of the shaft 14:. A part 2 1 of thedriving shaft 14:, between the inner end thereof and the bearing 15, isformed of reduced diameter. The driven shaft 16, journaled in thebearing 17, is formed with a hollow portion encircling the inner end ofthe driving shaft 11 and extending into the socket 22 of the gear 21 andterminating near the bearing for said driving shaft. The hollow port-ionof the driven shaft 16, which is preferably of angular cross section, isprovided with transverse ducts 25 communicating with the interiorthereof, and supports a pair of sliding gears 26 and 27, securedtogether, one of these gears having a clutch face for coacting with acorresponding clutch face on the gear 21. Bushings 28 and 29 areinterposed between contiguous surfaces of the shafts 14 and 16 atopposite sides of the reduced part 24 of the shaft 14, are suitablyfixed to the shaft 16, and are formed with transverse ducts 30 alinedwith some of the ducts 25.

The countershaft 18 is provided with suitable gears 31,32, 33 and 34, ofvarying diameters, secured thereto, the gear 31 being engaged with, thegear 21, and the gears 32 and 33being detachably engaged, respectively,by the gears 26 and 27, and the gear 34 being engaged with a gear 35mounted on the spindle 20. The shaft 18 is preferably of greater lengththan the distance between the opposing walls of the case 1, and the gear34 on said shaft is of less diameter than the internal opening of thecontiguous hub 4 in order that said shaft and ear may be moved axiallyin the hub for facilitating assembling of said parts in position.

The bearings 15, 17 and 19 are of any desirable construction, thoseillustrated being of a well-known type, including fixed external shells,revoluble internal rings, and antifrict-ion rollers or balls betweensuch shells and rings, and it is, therefore, unnecessary to} furtherdescribe the same.

As shown in Fig. 10, the spindle 20 extends through the hub 11 into thebearing of the lug 12, and is formed with a head provided withperipheral threads meshing with the internal threads of said hub. Ascrew 36 engages the hub 11 and the head of the spindle 20 for lockingthe spindle in position. Lubrication of the spindle is facilitated byducts 37 in the gear 35 leading from the exterior of said gear to thespindle 20, a lengthwise passage 38 in the spindle having one end closedand its opposite end opening through the end face of said spindlenearest the internal lug 12, and transverse ducts 39 extending throughthe periphery of the spindle from the passage 38.

The shiftin mechanism for the sliding gears 26 and 2? includes arectilinearly movable yoke 40, a rock shaft 41 journaled in bearing 13and having its ends extending above and below said bearing, an arm 42secured to the upper end of said rock shaft 41, a link 43' connectingthe yoke to the arm 42, and an arm 44 secured to the lower end of therock shaft 41. The yoke 40 is movable along the guide rod 45, having itsopposite ends supported in bearings 46, which are removably mounted inthe channels 10 and are held in position by the cover 2.

Means for controlling the gear shifting mechanism includes atransversely arranged rock shaft 47 mounted in a bearing 48 secured to aframe member 49 forming part of the construction of an automobile, anarm 50 secured to the inner end of the shaft and adapted to operativelyengage with arm 44,

and a hand lever 51 secured to the opposite end of the rock shaft.

52 represents part of the crank shaft of an explosive engine which isconnected with the driving shaft 14 by means including a clutchmechanism havin a sliding member 53 controlled by a depen ing arm 54integral with a sleeve 55 loosely mounted upon a transverse shaft 56,and 57 represents a foot lever, also integral with said sleeve andyieldingly held against movement in one direction by means of a tensionspring 58 having one end secured to the lever and its opposite end to afixed part ofthe frame.

For the purpose of preventing a manipulation of the hand lever 51 andits associated mechalnism connecting it with the speed changing devicesforming part of the transmission gear mechanism while the motor isoperatively connected with the latter, there is provided a lockingmechanism that con-- nects the hand lever 51 with the foot lever 57,including a sector 59 integral with arm 44, that is connected with thelower end of arm 50 by means of a ball and socket joint 60. The sectoris provided with notches, 61

upon its under surface, and 62 represents adetent pivotally mounted uponthe gear case and having one end adapted to engage with said notches andits opposite end connected with the sleeve 55 by means of a link 63 andan arm 64, the arm being an integral part of the sleeve. The sector isalso provided with peripheral depressions 65, and 66 represents aspring-pressed plunger bolt mounted in a bracket 67 secured to thebottom of the gear case and arranged radially relative to the axis ofthe sector and having a roller 68 journaled upon its inner end andadapted to engage with the periphery of the sector and projected intothe'depressed portions thereof, which depressions are spaced apart adistance equal to that between the notches 61, whereby the plungeroperates in a manner to automatically cause the notches to register withthe detent when brought in proximity thereto.

What I claim as my invention and desire to secure by Letters Patent is:

A power transmission gearing including, in combination, a driving shaft,means for transmitting motion to said shaft including clutch devices,said clutch devices including controlling means, said means including ashaft, a sleeve mounted upon said shaft, said sleeve having dependingarms and a foot lever, changeable speed gearing connected With saiddriving shaft, a lever mechanism adapted to control the position of saidgearing including a vertical shaft having said lever secured to one endthereof, a notched sector secured to the opposite end of said shaft, ahand lever operatively connected With said sector, a detent adapted toengage with said notched sector, one of the depending arms forming partof said sleeve being 10 connected With said clutch devices and the otherarm with said detent.

EDWARD ARTHUR JOHNSTON. W'itnesses:

F. G. RUSSELL, GEO. F. KLEIN.

(Iopies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. C.

